weijie.tong created DRILL-5691:
----------------------------------
Summary: multiple count distinct query planning error at physical
phase
Key: DRILL-5691
URL: https://issues.apache.org/jira/browse/DRILL-5691
Project: Apache Drill
Issue Type: Bug
Components: Execution - Relational Operators
Affects Versions: 1.10.0, 1.9.0
Reporter: weijie.tong
I materialized the count distinct query result in a cache , added a plugin rule
to translate the (Aggregate、Aggregate、Project、Scan) or
(Aggregate、Aggregate、Scan) to (Project、Scan) at the PARTITION_PRUNING phase.
Then ,once user issue count distinct queries , it will be translated to query
cache to get the result.
eg1: " select count(*),sum(a) ,count(distinct b) from t where dt=xx "
eg2:"select count(*),sum(a) ,count(distinct b) ,count(distinct c) from t where
dt=xxx "
eg1 will be right and have a query result as I expected , but eg2 will be wrong
at the physical phase.The error info is here:
https://gist.github.com/weijietong/1b8ed12db9490bf006e8b3fe0ee52269.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
